package com.authine.cloudpivot.web.api.util;

import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/**
 * @author chenjq
 */
public class ImportUtil {

    /**
     * 2003- 版本的excel
     */
    private final static String excel2003L = ".xls";

    /**
     * 2007+ 版本的excel
     */
    private final static String excel2007U = ".xlsx";

    /**
     * 描述：获取IO流中的数据，组装成List<List<Object>>对象
     * 
     * @param in,fileName
     *            param sheetNumber 获取第几个sheet的值，从0开始
     * @return
     * @throws Exception
     */
    public List<List<Object>> getBankListByExcel(InputStream in, String fileName, Integer sheetNumber)
        throws Exception {
        List<List<Object>> list = null;

        // 创建Excel工作薄
        Workbook work = this.getWorkbook(in, fileName);
        if (null == work) {
            throw new Exception("创建Excel工作薄为空！");
        }
        Sheet sheet = null;
        Row row = null;
        Cell cell = null;

        list = new ArrayList<>();
        // 遍历Excel中所有的sheet
        // for (int i = 0; i < work.getNumberOfSheets(); i++) {
        sheet = work.getSheetAt(sheetNumber);
        if (sheet == null) {
            return null;
        }

        // 遍历当前sheet中的所有行
        short cellNumber = 0;
        for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
            row = sheet.getRow(j);
            // if(row==null||row.getFirstCellNum()==j){continue;}
            if (row == null) {
                continue;
            }

            // 遍历所有的列
            // 循环第一行，获取标题的列数
            if (j == 0) {
                cellNumber = row.getLastCellNum();
            }

            List<Object> li = new ArrayList<Object>();
            for (int y = 0; y < cellNumber; y++) {
                cell = row.getCell(y);
                if (cell == null) {
                    li.add(null);
                } else {
                    li.add(this.getCellValue(cell));
                }
            }
            list.add(li);
        }
        // }
        work.close();
        return list;
    }

    /**
     * 描述：根据文件后缀，自适应上传文件的版本
     * 
     * @param inStr,fileName
     * @return
     * @throws Exception
     */
    public Workbook getWorkbook(InputStream inStr, String fileName) throws Exception {
        Workbook wb = null;
        String fileType = fileName.substring(fileName.lastIndexOf("."));
        if (excel2003L.equals(fileType)) {
            // 2003-
            wb = new HSSFWorkbook(inStr);
        } else if (excel2007U.equals(fileType)) {
            // 2007+
            wb = new XSSFWorkbook(inStr);
        } else {
            throw new Exception("解析的文件格式有误！");
        }
        return wb;
    }

    /**
     * 描述：对表格中数值进行格式化
     * 
     * @param cell
     * @return
     */
    @SuppressWarnings({"unused", "deprecation"})
    public Object getCellValue(Cell cell) {
        Object value = null;
        // 格式化number String字符
        DecimalFormat df = new DecimalFormat("0");
        // 日期格式化
        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");
        // 格式化数字
        DecimalFormat df2 = new DecimalFormat("0.00");
        DecimalFormat df1 = new DecimalFormat();
        df1.setGroupingUsed(false);

        CellType cellType = cell.getCellTypeEnum();

        switch (cellType) {
            case STRING:
                if (cell.getRichStringCellValue().getString() != null) {
                    value = String.format("%s", cell.getRichStringCellValue().getString());
                }
                break;
            case NUMERIC:
                if ("General".equals(cell.getCellStyle().getDataFormatString())) {
                    // df2.format(cell.getNumericCellValue());
                    value = df1.format(cell.getNumericCellValue());
                } else if ("m/d/yy".equals(cell.getCellStyle().getDataFormatString())) {
                    value = sdf.format(cell.getDateCellValue());
                } else {
                    // df2.format(cell.getNumericCellValue());
                    value = df1.format(cell.getNumericCellValue());
                }
                break;
            case BOOLEAN:
                value = cell.getBooleanCellValue();
                break;
            case BLANK:
                value = "";
                break;
            default:
                break;
        }
        return value;
    }
}
